Differential anesthesia valve



Oct. 25, 1949. w. A. PENNINGTON DIFFERENTIAL ANESTHESIA VALVE Filed July27, 1946 5 RN Y 0" JE Tl LN NN R E w m T, A A M a. um

Patented Oct. 25, 1949 UNITED STATES PATENT OFFICE DIFFERENTIALANESTHESIA VALVE William A. Pennington, Buckingham, Va.

Application July 27, 1946, Serial No. 686,637

2 Claims.

My invention relates to the administration of anesthesia.

It is the object of this invention to provide a differential anesthesiavalve.

It is the object of the invention to provide a valve that makes possiblethe alternate administration of two intravenous solutions.

It is a further object of the invention to provide all adjustments solocalized at one point as to make it possible for closer attention tothe patient with less necessary attention to the apparatus on the partof the physician.

It is a further object of the invention to provide a valve that hasrelatively large apertures to facilitate cleaning.

It is a further important object of the valve to make it impossible tomix the solutions within the valve.

It is the object of this invention to provide a valve with a singlepassageway to the patient, allowing communication between the syringeand the patient only, when administering anesthesia.

It is a further object to provide a valve in which the movement of thesingle passageway and the connecting of the syringe to a reservoir ofone material is effected; or the movement of the valve can be efiectedfor the connection of the syringe to another material. In either eventit is impossible to mix the materials on their Way to the patient.

It is a further object to alternately connect a solution to the patientand when one of such solutions is so connected, a charge of anothersolution is prepared for administration.

Referring to the drawings;

Figure l is an isometric perspective of the valve, the syringe, a supplyof pentothal, a supply of saline solution and the arm of the patientreceiving the material.

Figure 2 is a section through the valve with an elevation of the syringeshowing the valve in position for connection to the patient to thesaline solution while the syringe is connected to the pentothal supply.

Figure 3 is a similar view to Figure 2 showing the valve in position forthe discharge from the syringe of the pentothal charge to the patientwhile the saline solution has been shut ofi from the patient.

Figure 4 is a vertical section through the valve on line 4-4 of Figure 3indicating its construction and method of operation.

Figure 5 is a top plan view of the valve, showing in detail itsdirection indicator.

a valve body having a port 2, communicating with a pipe 3, constitutinga connector for the rubber pipe 4 that in turn is connected suitably tothe arm of the patient for intravenous application of the fluidshereinafter referred to.

The arm of the patinet is designated 5 and the attachment of the pipe 4is illustrated diagrammatically. The exact means of injection is of nointerest in connection with this invention.

6 is a port in the valve body I which communicates with the connector I,that in turn supports the rubber pipe 8 that is connected to a supply 9of pentothal.

The port In in the valve body I is connected to a connector I l which inturn supports the syringe l2. The actuation of the plunger l2a of thesyringe [2 serves to draw the pentothal into the syringe body and alsoserves to eject it at the suitable moment.

The passageway l3 in the valve body I is connected to the connector [4which in turn supports the rubber tube l5 that is connected to a salinesolution container [6.

The valve member I! is provided with a cutaway portion IB to form apassageway that will interconnect the several ports inside of the valvebody I A similar cutaway passageway is formed at 19. These internalpassageways serve to place source of supply and the patient in directcontact with one another or to connect the source of supply of pentothalto the syringe. It will be observed that in either way it is possible toconduct the fluid either to the patient or to the syringe without anypossibility of a mixture of the two.

A central passageway 20 is provided through the valve body which isadapted to connect the syringe to the patient. In such a position thereis no possibility of any connection of the saline solution to thepatient at the time the pentothal is being injected. The valve member I!will carry the handle 2! and is provided with an indicator arrow 22 andan indicator as to the position of the valve passageways at 23 and 24.The valve member is mounted upon a sealing ring 26 and is retained byretaining set screw 21. A suitable seal 28 is provided below the valve.

The novel feature of this invention resides in the ability, with asingle handle, to connect the patient to the saline solution or connectthe patient to the source of pentothal or other material without anypossibility of mixture. The further advantage is that while the patientis receiving the saline solution, a measured quantity of pentothal canbe withdrawn from the Referring to the drawings in detail, I designatescontainer 9 into the syringe l2 ready for the next 3 operation ofinjecting the pentothal into the patient. In this manner the single handof the physician or nurse may be employed for the purpose of completeregulation of the application of the several fluids involved with nopossibility of mixture or mistake.

It will be thus seen that I provide a valve which makes possible thealternate administration of 2 intravenous solutions all adjustmentslocalized atone. point; making it possible to. givecloser attention tothe patient with less necessary attention to the apparatus. The valveitself has. relatively large apertures which facilitate clearring andthey are so arranged that! it... is;impos'- sible to mix a solutionwithin the valve.

It will be understood that desire to com prehend within my inventionsuch. modificationsas may be necessary to adapt the invention to variousconditions of use, all within the scope of the hereinafter appendedclaims.

Lclaimz.

of." the; valvebody, having. spacedports four in. numben. arotor having.a. single transverse. passageway and two oppositely disposed quadrantsurfacepassagewayaa syringe connected toone of. saidaponts; asourceotanesthetic connected.

to. an. adjacent port, a source of saline solution connectedtoithe-other adjacent port and means;

on connecting; the patient. to the fourth. port whereby. as. said. valveis positioned in one-posinit's quadrant passageways will connectthe:saline solution to the patient and the. anesthetic;

tolthei syringe andin the other; position. the patient. will be.connected to. the. source of? anesthetics only in the syringe while thevsource of; anesthetic. and. the saline solution. are cut. 011

, way adjacent to said one passageway being connected to a source ofsaline solution and the fourtlrpassageway connected to a patient, meansin the syringe for withdrawing a supply of anest'hetic intothesyringe tomeasure it and prepare-info: injection whereby when the rotor is in oneposition its external passageways will connect'theisource of anestheticand the syringe to human-anesthesia. apparatus, the combina-tion.v

one another and connect the patient and the s-ounceiot saline solutionto.- one another. ancr. in the other position the internal passageway ofsaid rotor. wil-lconnect. the syringe. direct to the patient so that themeasured. supply of anesthetic canzbezinjected intothe patient.

REFERENCES. CITED The: following: references? are; of; record: tliez:

file" at this; patent:

UNITED STATESBA'I'ENTS I Number Name: Date:

1,978,351 Meeker: Sept. 11,19,342. 2,059,803 Mann Nov. 3;, 1936;

2,074,374 Mendoza Mar:'2'3,,19 37

